Weather will likely play an important role when you plan your trip to Hilongos, and keep in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually May and June with an average temp of 82°F, while the coldest months are February and January with an average of 80°F. The rainiest months in Hilongos are January, July, June, and December, with each month seeing an average of 13 inches of rainfall.